Block-mold.



J. D. BARBER.

BLOCK MOLD.

APPLICATION FILED JAN'. 27, 1908.

Patented June 29, 1909.

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v J. D. BARBER.

BLOCK MOLD.

APPLICATION FILED JAN. 27, 190s.

Patented June 29, 1909.

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BLOCK-MOLD Specification of Letters Patent.

Patented June 29, 1909.

Application filed January 27, 1908. Serial No. 412,722.

To all 'whom fit may concern:

Be it known that I, JOI-IN D. BARBER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Block-Molds, and do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in block molds, and the invention consists in a chimney built out of concrete blocks, all substantially as hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view, partly sectioned, of one of the concrete blocks constituting the present invention, and Fig. 2 is a cross section of the main part of the mold for making the said block, as hereinafter more fully described. Fig. 3 is a cross section of the mold and the block therein and with all the parts as they appear inthe completed condition of the block. Fig. et is a corresponding cross section with the core seen in Figs. 2 and 3 withdrawn and the outer mold-box withdrawn, leaving the block upon the baseboard and the bottom mold pieces therein. Fig. 5 is a plan view of Fig. 8, and Fig. 6 is a perspective view ofl one of the corner mold pieces shown in plan in Fig. 5. Fig. 7 is a perspective view, partly in section, of a companion block for that shown in Fig. 1, the practice being to build the chimney with the block shown in Figs. 1 and 2 alternately. Fig. S is a cross section of a mold adapted to have the block shown in Fig. 7 built therein. Fig. 9 is a cross section of the mold and block complete, and Fig. 10 is a cross section with the outer box and core removed and the block resting upon the board or floor upon which it is made, the edge pieces of the mold remaining in position to protect the flanges of the block. Fig. 11 is a plan view of the parts as seen in Fig. 9.

Now, having reference to the invention as disclosed in Figs. l to G, inclusive, it will be observedthat'block B as shown in Fig. l has a rib or belt f2- about its inside and middle which is approximately as deep as the wall of the block above or below said rib or belt, producing what may be regarded as recesses in the block top and bottom which are adapted to receive the flanges of the companion block which is built in with this particular block successively and alternately as the chimney is erected. Or, taking a different view of the said block, it may be described as having a normal thickness corresponding to that which is shown from the inner surface of the block, and that the npper and lower edges -3- respectively, represent flanges or interlocking extensions of the block with ledges -aon opposite edges of the belt 2- that constitute rests for the next block built thereon as will hereinafter clearly appear. In the manufacture of this block, a special kind of mold is required and original steps in manufacture in order that it may be successfully produced. To these ends I provide an outer mold box or receptacle M, having four sides corresponding to the shape or outline of the exterior 0f the block and a separate bottom board or slab D having a hole in its center corresponding to the interior size or draft opening through the block or chimney and adapted to receive the box shaped core C, which, also, has four sides and is placed in the outer mold-box as seen in Fig. 2. This being done I place the separate core pieces or members E therein as the bottom and next to said core, as shown, the construction and arrangement of said pieces being seen in Fig. 5. Said pieces are constructed to build a substantially solid wall about the core in the position they occupy and correspond to the recess at they are designed to produce. Said parts are separate and have at least one key member, G, of a shape or pattern adapted to be separately moved inward when core C has been withdrawn and to open up the space for removal of the several members E.

Specifically, the angle core pieces E are alike and interchangeable but are cut on a bias or bevel at their meeting portions or ends, as also are pieces Gr, whereby they mutually support each other in position when the mold box and core are withdrawn. The advantage of this construction of said parts will clearly appear further along. Then, having the outer mold-box or receptacle and the core and the core pieces E and G arranged as thus shown and described and seen in Fig. 2, the concrete material is filled into the mold and properly lumped so as to evenly fill the mold. The block is then a completed article so far as the mere building thereof is concerned, but it still remains green and soft and in no condition to be handled as a block, and hence the manufacture is incomplete. In fact it is in no condition to be handled at all excepting upon its base support l). Hence the next step in manufacture is to remove the mold box M by carefully withdrawing the same from over the block and then withdrawing core C, which is slightly tapered in order t-hat withdrawal may be effected without injury to the flanges 3 of the block. This leaves the recess or core members E and G in the block as seen in Figs. 3, et and 5 with the block resting upon the bottom set of said members on board D. The said board with the block thereon and the parts E and G therein are then removed together to the drying shed or space and left there with the said core members undist-urbed in the block until the flanges 3 have sufficiently hardened to make it safe to remove said members. The time for this may be a day or two or longer, according to the nature of the material, but a person will soon learn to know when it is safe to handle the block without said pieces and then the said pieces E and G are removed and are used over again in the manufacture.

The advantage of the peculiar construction of member G will be apparent at this time because experience has shown that it is not really practicable to make a solid frame corresponding to the parts E and G, top and bottom., and except to remove said frame by lifting it bodily out of the surrounding flange. On the other hand, I have found that to use a solid frame in t-his position is not feasible for the reason that it cannot be removed without danger of injuring the flanges of the block, even with the utmost care. Then again, the frame adheres to the said flange so closely thatI its removal is next to impossible, and this is true whether wooden and metallic frames be used. Hence, a sectional frame, so to speak, or separate core pieces, which can be removed one by one inward away from the flange is believed to be the only practical and useful way of building concrete blocks with flanges 3 as shown. For this reason I have also found it advantageous to use a key member corresponding to G, which is free as respects the adjacent members at each side to be removed bodily inward and taken out without possible injury to flange 3. Then the other three members are within easy reach and can be picked out one by one, and the flange left intact all around. Assuming that the block is now properly seasoned at the bottom as well as at the top it may be handled as a block, and the bottom members E and Gr be removed in like manner. This being done, the manufacture of the block is completed and it may then be restedY or supported upon its own flange 3 4in the curing yard with safety and without danger that the said flange will break down under the weight of the block, as would have occurred if the members E and G had been removed in the first instance when the block was first made. Hence, the said members are necessary factors in the manufacture of the block and in the support thereof in its green condition, and so far as I know and believe it is impossible to manufacture this kind of a block without the said members or their equivalent, serving as such supports and rests for the block and protectors to the said flanges.

New passing to the manufacture of the companion blocks B, shown in Figs. 7 to 11, inclusive, the same general principle of construction of manufacture prevails as in the making of the preceding block B, but this block has flanges 5 projecting from its opposite edges about its inner portion and the inner flue space or opening through this block corresponds to the inner diameter or opening of block B within its belt 2, and the said flanges 5 are adapted to project into and occupy the corresponding recess in the said block B above and below the said belt respectively according as block B comes above or below the block B. Then as the said blocks are built one upon the other successively, the respective flanges 3 and 4 interlock and both the inner and the outer sur faces of the blocks become flush one with the other and provide an inside draft space for the chimney. The said ledges 4- and flanges 5 may be so reduced relatively as to the recesses they are to occupy that a measure of mortar may be employed to unite the same and a unitary structure of the chimney will thus be produced.

On the manufacture of the block B the same outer mold M and inner core C are employed as in the manufacture of block B, making said parts interchangeable as to both styles of blocks. But to produce block B I use separate core pieces or parts H shown in Fig. ll, and which are straight pieces adapted to be laid in the bottom of the mold upon bottom board D about the outer portion thereof, as clearly seen in Fig. 8 and apart from the core C, so that when the mold is filled and tamped and the flanges 5 formed top and bottom the said core pieces will remain in the block until it is cured, as in the production of block B. Then when the block has been formed as seen in Fig. 9, the mold box M is withdrawn from about the block and likewise core C and the block is then allowed to rest upon the board I) with the core pieces I-I in position thereon to sustain and protect the flanges 5, as in the first instance for the protection of flanges 3, and said core pieces remain in such position until the block is suiiieiently cured or hardened to warrant their removal. Then they can be removed as also the supporting board I) and the said parts used in the manufacture of other blocks as already described.

What I claim is l. In block molding, a mold-box and a core therein and a separate base board supporting said parts, in combination with core pieces adapted to be built about the said core at the top and bottom of the mold and having beveled overlapping ends, said core pieces including a separately removable key member.

2. A block mold consistingof an outerA molding receptacle and a core therein and a base-board on which said parts rest, in combination with separate core pieces built about said core within said receptacle and including a key member adapted to be removed independently of the other pieces, whereby said pieces are unlocked for separate removal and injury to the block is prevented.

3. In block molding, a suitable mold re ceptacle and a core and a separate base support for said parts, in combination with a plurality of core pieces adapted to rest in the bottom of said receptacle on said support between the said receptacle and said core, whereby the block is molded upon said core pieces and adapted to rest thereon until it becomes seasoned to self sustaining hardness, said core pieces beveled and overlapping at their ends, whereby they are made separately removable. x

In testimony whereof I sign this specification in the presence of two witnesses.

JOI-IN D. BARBER. Witnesses E. M. FISHER, F. C. GNUSSUN. 

